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Re: Pub. 249 question
From: Greg R_
Date: 2017 Nov 24, 06:41 +0000

As I understand it, they're also selected to give good angles for the fix.

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On Thu, 11/23/17, Stan K  wrote:

 Subject: [NavList] Pub. 249 question
 To: gregr_ingest@yahoo.com
 Date: Thursday, November 23, 2017, 8:08 PM

 Pub. 249 (formerly H.O. 249) Volume 1
 includes 41 of the 57 navigational stars, but for any
 particular latitude and 15º band of LHA of Aries there are
 seven "selected" stars, considered the best for
 observation.  But at any particular latitude
 and 15º band
 of LHA, there are certainly more than those
 seven of the 41 available for observation.  On what
 basis are those seven selected?  I'm thinking
 altitude might be one factor - not too low, not too
 high.  But that would definitely not be everything.

 Stan

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